Yes ( and no, although I think you can cross no of that list if I understand what you're asking for.
First the no: everybody should know it for themselves. If someone thinks of it as a very bad thing, if someone is not healthy, emotionally instable, etc, then no.)
I think the experience is something that can be useful throughout your life. Maybe because of a different view on people, life, or whatever your story is. But for me it is because I can get back a little bit of the feeling I got the first time. Power of the mind. I can think back and still feel tingling going on in my arms, butterflies on my stomach. (Even now talking about it get's me going...) It also relaxes me, I start breathing differently, and I feel very happy. It truly feels like a 'small roll', only generated by my head.
It's not just thinking that triggers it. Sometimes it's a sunny day where I recognize a little bit of the setting where I was my first time. Also music that sounds like the music I was listening to that very first day will trigger this.
I think it's the one thing that can make me very happy for a short time, in no time. (I am almost always happy by the way, but this just gives me a very big boost.)
[Sorry if this is kind of hard to read, I am working my ass of atm and haven't been sleeping much and well ;-)]